Continuous-girder turntable



0. E. HOVEY. CONTINUOUS GIRDER TURNTABLE.

APPLICATION FILED NOV. 25, 192]- Paltented May 30, I2 SHEETS-SHEET l.

0. E. HOVEY. commuous GIRDER TURNTABLE.

APPLICATION FILED NOV-26, I921.

Patented May 30, 1922.

I2 SHEETS-SHEET 2.

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0. E. HOVEY. CONTINUOUS GIRDER TURNTABLE.

APPLICATION FILED NOV.26, I921. 1,417,917. Patented y30,1922.

I2 SHE ETSSHEET 4.

Viines [martian- O. E. HOV EY- CONTINUOUS GIRDER TURNTABLE.

APPLICATION FILED NOV.26, I92I. 1,417,917. Patented y30, 1922.

I2 SHEETS-SHEET 5.

O. E. HOVEY. CONTINUOUS GIRDER TURNTABLE.

APPLICATION FILED NOV..2fi. 1921.

Patented May 30, 1922.

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I CONTINUOUS GIRDER TURNTABLE.

APPLICATION FILED N0V.'26. 1921.

Patented May 30, 1922.

0. E. HOVEY.- commuous GIRDERTURNTABLE.

APPLICATION FILED NOV-26, 192].

Patented May 30, 1922.

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APPLICATION FILED NOV.25. 192l- 1,417,917. Patented May 30, 1922.

l2 SHEETS-SHEET ID.

0. E. HOVEY.

CONTINUOUS GIRDER TURNTABLE.

APPLICATION FILED NOV.26, 192I.

l ,4 1 '7, 9 1 '7. e ted May 30, 1922.

12 SHEEI'SSHEET II.

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CONTINUOUS GIRDER TURNTABLE. APPLICATION FILED NOV.26, 1921.

l ,41 7 ,9 1 7. Patented May 30, 1922.

I2 SHEETSSHEET l2.

II I l Invent??? 07/5 5 flare- OTIS E. HOVEY, OF NEW YORK, N. Y.

CONTINUOUS-GIRDER TURNTABLE.

T 0 all whom it may concern:

Be it known that I, (has E. HOVEY, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Continuous-Girder Turntables, of which the following is a specification.

This invention relates to continuous girder floor systems, add greatly to the first cost of the installation. Such turntables must also be arranged to tilt longitudinally across the center bearing so that when the end truck wheels are in contact with the circular rails in the pit at one end of the table, those at the other end are lifted off from their proper bearings upon the pit rails. As engines pass upon or off from suchtables they cause "iolent shocks to the end trucks and wheels tending to cause rapid destruction of the parts.

Sometimes turntables arebuilt as two discontinuous, or twin, spans placed end to end, each supported by the end trucks and wheels at one end, and the center hearing at the other. In such construction the end trucks and wheels must carry heavy loads from the table and loads upon it while being revolved in the pit. This results in large losses of power due to journal friction of the end wheel axles in their bearings. It is also difficult to connect the separate spans end to end, at the center hearing, so that the table is amply rigid to resist the large stresses in a horizontal plane due to turn ing the table in its pit; and at the same time make the details so that the girders are free to deflect un der loads and to act as separate simple spans under stresses in vertical planes at the center bearing.

Specification of Letters Patent.

Application filed November 26, 1921.

Patented May 30,

Serial No. 517,867.

The continuous girder turntable which is the object of this invention, is intended to avoid these features and to provide a struc ture rigid across the center, both vertically and horizontally, and to permit the use of relatively shallow and economical pit, which can be easily drained, and to gain the advantage of the economy in weight of mate rials due to the continuous construction. With the construction proposed it is not necessary to carefully balance the locomotive, or other load, for turning, as the continuous construction provides end, as well as center supports.

The loads carried by the end trucks and wheels are much less than in the case of discontinuous, or twin span, tables, thus re ducing the losses of power by friction; at the same time the end Wheels carry enough load at all timesso that the table can be revolved in its it by driving some, or all, of the end whee s from some form of motor and gearing. built asa self-contained part of the turntable.

Another object of this invention is to provide a novel adjusting device between the notched or perforated ends of the continuous girders and the end truck frames. The use of this device makes it possible to adjust the amount of end reaction between the trucks and the continuous girders in order to secure any desired intensity of pressure between the end truck wheels and the rail in the pit. It also affords means for adjusting the relative positions of the main framework of the turntable and the trucks at the four supported notched end corners so that the end wheels may be in one horizontal plane even when the main framework is slightly warped and inaccurate in its construction.

Another object is to provide a novel lateral system, arranged to rigidly hold the points where the trucks attach to the ends of the continuous girders, this lateral system being extended from each end truck of the turntable to the center cross girder or girders. and attached thereto by suitable anchor plates and connections, in such a manner that the laterals form a continuous horito resist all Wind and other transverse forces,-

all longitudinal forces due to shocks of rolling stock passing upon or off from the turntable, as well as those due to acceleration and braking of the load upon the turntable. Rigid cross frames at the ends and intermediate points hold the continuous girders in true vertical position. 1

The ordinary method-of propelling the ends of center bearing, balanced cantilever turntable around the .pit is by means of a power driven tractor supported by one or more wheels, the tractor being a separate mechanism attached to the turntable girders by hinged connections. On turntables of two simple discontinuous spans the mechanism has been mounted upon the main deck, or floor, of the turntable; and power transmitted from the motorto the driven end wheel of the turntable by. a train of gears,

in such a manner that there is relative motion between the motor and mechanism mounted on the turntable floor and the wheel driving gear mounted on the truck. This motion occurs whenever any irregularity in surface of the pit rail exists and tends to cause bad operating conditions, causing the gears to mesh improperly.

A furtherobject of this invention is'to avoid separate tractors, attached to the turntable, and to arrange'the driving device so that the motor and train of gears, or other equivalent upon the end truck so that the truck and mechanism upon'it may act as a unit and rock slightly, with respect to the main girders, whenever the surface of the supporting pit rails is irregular. The tractive force available for driving the turntable depends 'upon the reactions of the endwheels upon These reactions are the circular pit rails. primarily due to the proportion of the weight of the turntable and its load which is delivered to the end trucks and wheels bv the continuous girder action of the main girders.

in such a In the improved construction they may be modified as desired by means of the adjusting above.

Another object of driven wheels'upon the pit rail by mounting the motor and transmission mechanism position upon the trucks that their Weight. acting upon the extended cantilever ends of the truck frames, may increase the pressure of the driven wheels upon the pit rails, and thus materially increase the available tractive effort of the driven wheels.

A- further object is to arrange the motorand transmission mechanism, mounted on the cantilever ends of the truck frames, so that the motor can be placed at any desired struction.

mechanism is mounted bodily the invention is to further control the available traction of the height above the pit is periodically flooded by water.

the pit rail, in cases where A still further .object of the invention isv stock, may be used; and also to provide for the convenient use" of roller bearings, 1n

place of the ordinary car journals, when it 1s necessary to reduce the journal friction below that of the ordinary car-journal con- The above and other objects of the invention will more fully appear as the description of the invention with its novel combinat on proceeds, and the arrangementof the various parts are described and claimed.

Preferred and practical embodiments of the present invention are illustrated in the accompanying drawings, in which:

Figure 1 is a side. elevation of more'than one half of the continuous girder turntable,

with notched ends for clearing the trucks,

also showing laterals in the plane of truck attachments. Theshallow pit allowed by the continuous construction is a so shown in section. i Figure l is a section showing the and center cross girder.

FigureQ is a plan View of the continuous center the lines a.a,-. showing the lateral system and the arrangement of the mechanism for driving one of the end truck wheels.

Figure 3 is a sectional elevation on line III-III of Figure 2. .It shows an elevation of an end truck, the adjusting device between the continuous girder and the truck, the end truck wheels and the rail upon which they travel, also a motor and gearing for driving an end wheel, this motor and gearing being located in such a position as to increase the traction ofthe driven wheel, as will be more fully described. I

Figure 4 is a sectional elevation on line IV-IV of Figure It shows further dethe adjusting device, end trucks, wheels and i the track in the pit. device provided, as described Figure 5 is a plan on line VV of Figure 3, taken just at the .top surface of the adjusting device, shown here as double wedges. In order to clearly show the adjusting device the wheels, bearings and mechanism are omitted from this plan.

Figure 6 is a sectional elevat on of the I o I l girder turntable, divlded in two parts along continuous girder trucks and track, and

shows an alternative arrangement of an adjusting device, in which jacks are used to raise the ends of the continuous girders and shims, of suitable thickness, inserted between the ends of the continuous girders and the trucks, after which the jacks lower the ends of the girders upon the shims, completing the adjustment.

Figure 7 is a sectional elevation of more than one half of one ofthe continuous girders divided in two parts along the lines w-w, and showing asystem of laterals directly joining the points of attachment of the trucks to the girders and the center oross' girder just above the center on which the turntable revolves. v P

Figure 8 is a sectional plan on line VIII VIII of Figure 7, and also divided in two parts'along the lines :r-w, more fully showing the'laterals and their attachments to the f truck connection, the continuous girders, and the center cross girders, and further showing that the laterals contlnue across the center of the table, and thus form a horizonstandard railroad car journal bearings for the support of the end trucks upon the axles of the end wheels.

Figure 12 shows a modification of the construction of F'i ure 11 whereby roller hearings in special housings may be used in place of the standard M. C. B. journal bearings.

Figure 13 is a sectional plan at one end of the continuous turntable on the line XIII-XIII of Figure 14 showing a modification in the arrangement of the end wheel driving mechanism to permit the motor to be raised vertically above the truckso that it may be above flood water in cases where the turntable bit is periodically flooded.

Figure 14 is a sectional elevation of the apparatus of Figure 13 drawn to a larger scale to more fully show this arrangement.

Figure 15 is a small scale plan of the motor and gears from line XV-XV of Figure 14. I

In the drawings, the numeral 1 designates the continuous girders which extend the full diameter of the pit A and at the. center connect to cross girder 2 which rests upon the center bearing 3 which is supported by the center pier 4.. At each end of the continuous girders notches 5 permit the attachment of the truck girders 6 in such a manner that by means of the notches the vertical height of the combination is kept within the desired limits. Between the bearing 7 on the lower faces of the notched portion of the girders, and the trucks girders 6 are inserted adjusting devices, which consist of bearing blocks 8, wedges'9, tension rods or bolts 10 and attachment bolts 11, passing through angle iron connecting members 12 I secured the girders 1 in a well known manner.

If now when the continuous turntable is placed in the pit upon the adjusting devices end trucks and center, it is found that the four end corners are not of the correct elevation-and inthe same plane, they can be brought to exact positions by tightening or loosening the bolt 10 so as to force the wedge members 9 to raise or lower the girders. It

may als 'be'found that the driven wheels do not bear upon the supporting circular rails in the pit hard enough to provide adequate traction to propel the empty table in the pit. In this case the adjusting devices .are used to lift the ends of the continuous girders until adequate traction is developed. When the adjustment has been made the turntable girders become true continuous girders for all live loads, like locomotives or other rolling .stock, upon them; since each girder has three supports one at each end upon the adjusting device, end truck and wheels, and one at its attachment to the center cross girder which rests upon the center and foundation. The supports are rigid and the loads taken by each may be calculated from the known elasticproperties of the continuous main girders. I

It will be understood that any equivalen V I substantial mechanical .device' for making the adjustment may be substituted for the i I blocks, wedges and tension rods, without departing from the spirit of this part of the invention.

Another method of making this adjustment is shown in Figure 6, in which shims 15 are substituted for the wedges 9 and their associated parts. Foundations 13 are prepared so that each end of each continuous girder may bealined therewith, and jacks 14 are seated on these foundations and used to slightly lift the ends of continuous girders 1, thus lifting the notched ends free of the supporting trucks 6, so that shims 15 may then be removed or added in such thicknesses that after lowering the continuous girder ends upon them, by releasing the jacks, the required adjustment is accomplished. 1

It is important that a continuous turntable be thoroughly braced horizontally from end to end and across the center, in order to resist transverse and traction forces, and the points of attachment of the traction forces, and the points of attachment of the trucks to the girders must be rigidly held in position and alinement to resist local traction and other stresses and cause the whole machine to revolve accurately and smoothly. Anchor plates 16 are connected to the angle iron members 12 adjacent the ends of the continuous girders and bracing laterals 17 rigidly connected to them. These in turn connect t anchor plates 18. laterals 19 and so on until laterals 20 connect to anchor plates 21, which are also rigidly attached to continuous girders 1 and the center cross girders 2; and to laterals which continue in the same manner as shown to final connection to the attachment of the truck at the 'farend of the table not shown by the drawings, thus forming a system symmetrical about the center and contmuous from end to end of the turntable.

' 3, where all lateral and longitudinal forces are ultimately delivered.

The anchor 'plates 16 are secured to the angle iron members 12'Tand other anchor plates. 18 are secured to the girder 1 and the respective cross frames 22, 23, 24 and 24 and the center anchor plate 21 is secured to the crossgirder 2 and side girders 1, all of said anchor plates being on a plane with the member 12. A pair of laterals 17 are secured at one'end to the anchor plates 16 and at their other ends to the anchor plates '18 secured to the cross frame 22, and other latrals 19, 19 19 are secured to the successive anchor plates 18, and laterals 20 are secured to the anchor plates 18 secured to the cross frame 24 and to anchor plates 21 secured to the center cross girder 2. The same system of laterals is continued or duplicated from the center cross frame 2 to the opposite end of the table, thus delivering all the stresses to the center bearing. It is often more desirable to use a system of laterals in the planes of'both top and bottom flanges 0f the continuous girders to more positively hold them in rigid alinement than can be done by a single system of bracing as described above. This can be accomplished by the construction shown in Figures 9 and 10. In Fi ure 9 the anchor plates 16 and laterals 17, old the truck attachments as in Figure 7, but at anchor plates 18, secured to the cross frame 22 this single system of bracing branches into two in the panel between cross frames 22 and 23. That is, pairs of laterals 199 and 19-9 extend upwardly and downwardly, respectively, from the anchor plates 18- and are secured to anchor plates 25 and 25 secured to the girders 1 and the upper and lower ends of the cross frames 23, respectively. Other laterals 26 and 27 are secured to the anchor plates 25 and 25 and to other plates 28 and 28 secured to the girders 1 and cross frames 24 and 24 and upper and lower laterals 29 and 29*, respectively, extend from the anchor plates 28 and 28 secured to cross frames 24 to anchor plates 30 and 3O secured to the upper and lower portions of the central cross girder 2. The same lateral system is continued on the opposite side of the center girder 2.

Figure 10 shows a simpler and equally eflicient construction. The bracing members 16, 17, 18 remain as before, but the anchor plates donot extend beyond the cross frame 22, but are securely and rigidly fastened thereto. Other anchor plates 50 and 51 are secured to the top and bottom of the cross frames 22, 23, 24, and 24 and cross girder 2and upper and lower-laterals 52 and 53 are secured to the successive anchor plates, thus the cross frame 22 serves to deliver the stresses to the top and bottom lateral system which deliver them to the center cross girder 2.

To propel the continuous turntable in the pit this invention provides a motor and mechanism mounted in a novel manner. A motor of any desired type 31 is mounted on the extended cantilever end of the truck 6 and is arranged to drive certain of the end supporting wheels 32 by means of a suitmechanism between the motor andvthe axle 1 "37 of the driven wheel 32, may be spur gearing as shown or any other equivalent mechanism, and arranged in any suitable man ner.

In this invention the motor and mechanism is mounted upon the truck frame so that it may follow all movements of the truck with respect to the continuous girder due to the travel of the wheels uponan uneven track. It is further mounted upon the extended cantilever end of the truck 6, so that the center of gravity of the motor, mechanism and extended truck frame is in a vertical plane 38, at a material distance from the central plane of the axle 37 of the driven wheel 32. The invention thus enables the tractive effort of the driven wheel 32 to be materially increased above the amount that would have been available had the motor and mechanism been mounted in some other manner than that shown by this invention.

Figures 13, 14 and 15 show a variation of the special arrangement described above in which the motor 40 is mounted upon the upwardly extending end 41 of the truck 6 and a train of gears 42, 43, 44, 45 and 46, or any equivalent mechanism, transmits power from the motor to the driven wheel 47. The ob'ect of this special mounting is to accomphsh all effects produced by the arrangement shown in Figure 3 and in addition to permit the motor to'be placed above the level of flood water at certain turntable sites.

Figures 11 and 12 show alternative arrangement of the truck axle bearings. In Figure 11, standard M. C. B. railroad car .journal bearings 48 are placed upon the truck frames 6 in a novel manner so that they can be easily maintained and the parts renewed, by sli htly raising the main turntable trucks and bearings thus relieving the axles of load. In Figure 12 roller bearings 49 are carried in novel housings 50 so made as to serve all purposes of the M. C. B. bearings of Figure 11 and to be interchangeable therewith.

' I claim 1. A continuous girder turntable comprising a pair of continuous girders, at least three non-yielding supports for each of said girders, said girders being notched at each end and wheeled truck-members secured to the notched portions of said girders, independent means between each of said girders and said trucks for adjusting said girders vertically relative to said trucks, and'means on said trucks for propelling saiditrucks.

2. A continuous girder turntable comprising a pair of continuous girders, at least three non-yielding supports for each of said girders, said girders being notched at each end and wheeled truck members secured to the notched portions of said girders, independent means between each of said girders and said trucks for adjusting said girders vertically relative to said trucks, said means comprising upper and lower bearing blocks secured to said girder and said truck, wedge members mounted between said bearing blocks, and a tension bolt passing through said. wedges and adapted to move them toward or away from each other to raise or lower said girders.

3. A continuous girder turntable comprising a pair of continuous girders, at least,

three non-yielding supports for each of said girders, suitable horizontal and vertical supporting members arranged to' support said girders, wheeled truck members mounted on each end of said irders, an extended cantilever end on said trucks, a motor mounted on saidcantilever and a suitable connecting said motor and the of the truck.

' 4. A continuous girder turntable comprisgearing driving wheel ing a pair of continuous girders, at least three non-yielding supports for each of said girders, suitable horizontal and vertical supporting members arranged to support said girders, wheeled. truck members mounted on each end of said girders, an extended cantilever end on said trucks, a motor mounted on said cantilever and a suitable gearing connecting said motor and the driving wheel of the truck, said motor, gearing, and" extended cantilever end of said truckv being so positioned as to have its center of gravity in a vertical plane at a material distance beyond the central plane of the bracing system secured adjacent each end.

of the table on a plane with the jluicture of said trucks with the girders and extending inwardly toward said central cross.

girder, said system being secured to each of said cross trames and said central cross girder, thereby forming a cont nuous horizontal bracing system from end to'end of the table adapted to deliver all stresses to said central cross girder and center bearing.

6;A continuous girder turntable comprising a pairof contlnuous side girders, suitable cross frames spaced at intervals and secured to said girders, a central cross girder secured to said girders, a center bearing under said central-cross girder. said side girders being notched at each end, wheeled truck members secured to the notched portions of said side girders, and a lateral bracing system comprising a pair of anchor plates secured adjacent the ends of said side girders on a plane with the juncture of said trucks with said side girders, a pair of lateral braces secured to said anchor plates and extending rearwardly on a plane with said anchor plates and secured to other anchor .plates on the endmost cross frame, and other laterals secured to said endmost cross frame and to the successive cross frames and tosaid central cross girder to form a continuous lateral bracing system from each end of said table tosaid central cross girder.

7 A continuous girder turntable comprising a pair of continuous side girders, suit able cross frames spaced at intervals and secured to said girders, a central cross girder secured to said girders, a center bearing under said central cross girder, said side girders being notched at each end, wheeled truck members secured to the notched portions of said side girders, and a lateral bracing system comprising a series of anchor plates secured to said side girders on a .plane with the juncture of said trucks with said, side girders, the central one of said anchor plates being secured to said central by forming a horizontal lateral bracing system from end to end of the table adapted to resist all transverse and longitudina stresses and deliver such stresses to the central cross girder and bearin 8. A continuous t'urntabl pair of continuous girders, supports for each of said girders, wheeled truck members secured to the ends of said girders, independent means between each of said girders and said trucks for adjusting said girders vertically relative to said trucks, and means on said trucks for propelling said trucks.

e comprising a at least three I 9. A continuous girder turntable comprislng a pair of continuous girders, at least 1 three supports for each of said girders, suitsigned my name.

OTIS E. HOVEY. 

